Switch to stable Eclipse platform release URL

Change-Id: Ide3d47438b7410ab3e4dea638ad719395ee0e85d
Signed-off-by: Markus Knauer <mknauer@eclipsesource.com>
diff --git a/releng/org.eclipse.rap.build/pom.xml b/releng/org.eclipse.rap.build/pom.xml
index 4f40acd..995e96c 100644
--- a/releng/org.eclipse.rap.build/pom.xml
+++ b/releng/org.eclipse.rap.build/pom.xml
@@ -31,7 +31,7 @@
     <cbi-plugins.version>1.1.2</cbi-plugins.version>
     <jetty-repo.url>http://download.eclipse.org/jetty/updates/jetty-bundles-9.x/9.4.14.v20181113/</jetty-repo.url>
     <orbit-repo.url>http://download.eclipse.org/tools/orbit/downloads/drops/R20181128170323/repository/</orbit-repo.url>
-    <platform-repo.url>http://download.eclipse.org/eclipse/updates/4.10milestones/S-4.10RC2-201812060815/</platform-repo.url>
+    <platform-repo.url>http://download.eclipse.org/eclipse/updates/4.10/R-4.10-201812060815/</platform-repo.url>
     <rap-extra-repo.url>http://build.eclipse.org/rt/rap/base-platforms/3.7/extra-dependencies/</rap-extra-repo.url>
     <license-repo.url>http://download.eclipse.org/cbi/updates/license/</license-repo.url>
     <!-- The build type, N for nighty builds, S for stable builds. S-builds will be signed. -->